(StÃ¼ck) RCF 54cm TieftÃ¶ner LF21X451

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8 Ohm, 2000W RMS, 97dB/W/m, 28-700 (150)Hz, 115mm Schwingspule in-/outside gewickelt, hinterlüftete Zentrierung, T-Polkern, Xmax +/-13,5mm, 200-350l BR

Lieferzeit 3-5 Werktage:

Artikelnummer: RCF-LF21X451

Preis: 620,00 €

[inkl. 19% MwSt zzgl. Versandkosten]

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The LF21X451 low frequency transducer is the result of many years of R&D developments with the goal of creating new levels of professional audio performance standards. This products features advancements and improvements in all the key areas of transducer technology.

Incredibly linear frequency response characteristics, the highest power handling of any comparable transducer, the lowest power compression. The LF21X451 features a fibre loaded cone assembly along with a high excursion triple roll, constant geometry surround: this combination provides remarkable strength and a peak to peak maximum excursion of 54 mm. The new dual forced hyper-venting system guarantee a very efficient voice coil ventilation for minimum power compression and incredible power handling.

Features

4,5 - inch fiberglass Inside/Outside copper voice coil
4000 Watt continuous program power handling
97 dB Sensitivity
28 Hz - 1 kHz Frequency range
Dual-forced air ventilation for minimum power compression
Dual spider designed with silicon based damping control
BL of 30.5 Txm to provide a faster and accurate low frequency

General Specifications

Nominal Diameter:530 / 21 mm/inch
Rated Impedance:8 Ω
Program Power:4000 W AES
Power handling capacity:2000 W AES
Sensitivity:97 dB
Frequency Range:28 Hz ÷ 1000 Hz
Effective Piston Diameter:470 / 18.5 mm/inch
Max Excursion Before Damage (peak to peak):54 / 2.12 mm/inch
Minimum Impedance:6.7 Ω
Voice Coil Diameter:115 / 4.5 mm/inch
Voice Coil Material:Copper
Voice Coil Winding Depth:34 / 1.33 mm/inch
Number of layers:2
Kind of layer:inside / outside
Top Plate Thickness:15 / 0.6 mm/inch
Cone Material:No pressed pulp
Cone Design:Curved
Surround Material:Polycotton
Surround Design:Triple roll

Thiele/Small Parameters

DC resistance:5.4Ω
Mechanical factor:6.9
Electrical factor:0.39
Total factor:0.37
BL Factor:30.5 T · m
Effective Moving Mass:355 g
Equivalent Cas air load:385 liters
Effettive piston area:0.173 m²
Max. linear excursion (mathematical):13.5 mm
Voice - coil inductance @ 1kHz:2.9 mH
Half-space efficiency:2.2%

Mounting information

Overall Diameter:547 / 21.5 mm/inch
Bolt Circle Diameter:527 / 20.7 mm/inch
Bolt Hole Diameter:6.5 / 0.25 mm/inch
Front Mount Baffle Cut-out:512 / 20.1 mm/inch
Rear Mount Baffle Cut-out:512 / 20.1 mm/inch
Depth:230 / 9.05 mm/inch
Volume occupied by the driver:6.5 / 0.229 liters/ft³
Net Weight:15.5 / 34.0 kg/lbs

Shipping information

Shipping weight:17.59 / 26.6 kg/lbs

http://www.rcf.it/de_DE/c/document_library/get_file?p_l_id=6987797&folderId=22488&name=DLFE-21789.pdf

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